US 5,899,162 AGranted

Tanker reconstruction

AssigneeLes Industries Verreault (1991) Inc.

InventorsRichard C. Beaupre, Rejean Verreault

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Abstract

A method of reconstructing a liquid carrying tank vessel, such as an oil tanker, and to the reconstructed vessel whereby a tank vessel constructed with a single bottom hull is reconstructed to a double bottom hull configuration at least over the hull portion including the cargo tanks, and to the reconstructed vessel thereby obtained. The original hull is separated at a point where the bow curve meets the midships section of the hull. A new section is inserted which follows the curvature of the original bows, and increases both the beam and draft. A new double bottom is applied over the remainder of the cargo tank carrying space of the hull, which is tapered in to meet the curve of the stern section. The new section can be fabricated with, or without, a double bottom, depending on its intended use.

Claims12

Dependent claims

A method of reconstructing a tank vessel having a hull including a bow section, a midships cargo tank section and a stern section comprising the steps of:

(i) separating the bow section from the midships section at a point adjacent the aft end of the bow curve;
(ii) inserting an additional hull section between the separated bow section and the midships section which conforms to the shape of the bow section at its forward end;
(iii) incorporating the inserted section into the hull structure by attachment to the bow and midships sections at each end;
and
(iv) applying an outer double bottom separated from and attached to the sides and bottom of the midships section extending aft from the inserted section to a point astern of the cargo tanks in the midships section;
wherein:
(a) the inserted section substantially maintains the bow curve;
(b) the inserted section increases in both the beam and draft directions to provide a substantially smooth outer hull surface joining the bow section to the outer double bottom,
(c) the outer double bottom conforms to the shape of the midships section;
and
(d) the outer double bottom is tapered in to the existing side and bottom hull surface of the stern section aft of the cargo holding tanks.

8 more elements

Dependencies are inferred from the claim text.